/*
 *  Copyright 2004 Blandware (http://www.blandware.com)
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.blandware.atleap.webapp.action.core.contentPage;

import com.blandware.atleap.common.Constants;
import com.blandware.atleap.model.core.ContentPage;
import com.blandware.atleap.model.core.Layout;
import com.blandware.atleap.search.SearchManager;
import com.blandware.atleap.service.core.PageManager;
import com.blandware.atleap.service.exception.BeanAlreadyExistsException;
import com.blandware.atleap.webapp.action.core.BaseAction;
import com.blandware.atleap.webapp.form.core.ContentPageForm;
import com.blandware.atleap.webapp.util.core.CacheUtil;
import com.blandware.atleap.webapp.util.core.WebappUtil;
import org.apache.commons.validator.GenericValidator;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.springframework.orm.ObjectOptimisticLockingFailureException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * <p>Adds or removes content page to or from publishing
 * </p>
 * <p><a href="ChangeContentPageActivityAction.java.html"><i>View Source</i></a></p>
 * <p/>
 *
 * @author Sergey Zubtsovskiy <a href="mailto:sergey.zubtsovskiy@blandware.com">&lt;sergey.zubtsovskiy@blandware.com&gt;</a>
 * @author Andrey Grebnev <a href="mailto:andrey.grebnev@blandware.com">&lt;andrey.grebnev@blandware.com&gt;</a>
 * @version $Revision: 1.25 $ $Date: 2008/04/29 17:48:06 $
 * @struts.action path="/core/contentPage/changeActivity"
 * name="contentPageForm"
 * scope="request"
 * validate="false"
 * roles="core-contentPage-changeActivity"
 * @struts.action-forward name="listContentPages"
 * path="/core/contentPage/list.do"
 * redirect="true"
 * @struts.action-forward name="unsatisfiable"
 * path="/core/contentPage/list.do"
 */
public final class ChangeContentPageActivityAction extends BaseAction {
	/**
	 * @param mapping  The ActionMapping used to select this instance
	 * @param form     The optional ActionForm bean for this request (if any)
	 * @param request  The HTTP request we are proceeding
	 * @param response The HTTP response we are creating
	 * @return an ActionForward instance describing where and how
	 *         control should be forwarded, or null if response
	 *         has already been completed
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
	                             HttpServletRequest request, HttpServletResponse response) throws Exception {

		ContentPageForm contentPageForm = (ContentPageForm) form;

		Long contentPageId = null;
		if ( !GenericValidator.isBlankOrNull(contentPageForm.getId()) ) {
			contentPageId = Long.valueOf(contentPageForm.getId());
		} else {
			if ( log.isWarnEnabled() ) {
				log.warn("Missing content page ID. Returning to list.");
			}
			return mapping.findForward("listContentPages");
		}

		PageManager pageManager = (PageManager) getBean(Constants.PAGE_MANAGER_BEAN);
		ContentPage contentPage = pageManager.retrieveContentPage(contentPageId);

		if ( contentPage == null ) {
			// content page not found. it might be deleted by someone else
			ActionMessages errors = new ActionMessages();
			errors.add("contentPageNotFound", new ActionMessage("core.contentPage.errors.notFound"));
			saveErrors(request, errors);
			return mapping.findForward("listContentPages");
		}

		Layout layout = contentPage.getLayout();

		String mode = request.getParameter("mode");
		boolean alreadyActive = contentPage.getActive() != null && contentPage.getActive().booleanValue();
		boolean active = true;
		if ( !"active".equalsIgnoreCase(mode) ) {
			active = false;
		}

		try {

			if ( (alreadyActive && !active) || (!alreadyActive && active) ) {
				contentPage.setActive(Boolean.valueOf(active));
				pageManager.updateContentPage(contentPage, layout.getId());

				SearchManager searchManager = SearchManager.getInstance(request.getSession().getServletContext());
				searchManager.unIndexPage(contentPage.getUri(), request);

				CacheUtil cacheUtil = CacheUtil.getInstance(request);

				if ( active ) {
					searchManager.indexPage(contentPage, request);

					CacheUtil.ContentPageData cpd = new CacheUtil.ContentPageData(contentPage.getId(), layout.getCpDefinition(), WebappUtil.rolesToString(contentPage.getRoles()), contentPage.getCacheMaxAge());
					cacheUtil.putContentPageInCache(cpd, contentPage.getUri());

				} else {
					cacheUtil.flushContentPageCache(contentPage.getUri());
				}
			}


		} catch ( BeanAlreadyExistsException e ) {
			// contentPage already exists: will never be reached in our case
			ActionMessages errors = new ActionMessages();
			errors.add("contentPageAlreadyExists", new ActionMessage("core.contentPage.errors.alreadyExists"));
			saveErrors(request, errors);
			saveToken(request);
			return mapping.getInputForward();
		} catch ( ObjectOptimisticLockingFailureException e ) {
			// content page was updated or deleted by another transaction
			ActionMessages errors = new ActionMessages();
			errors.add("updateFailed", new ActionMessage("core.contentPage.errors.updateFailed"));
			saveErrors(request, errors);
			return mapping.findForward("listContentPages");
		}
		return mapping.findForward("listContentPages");
	}
}